Combined mixer and auxiliary air-inlet device



' Feb. 26, 1929.v 1,703,493

C. LEACH COMBINED MIXER AND AUXILIARY AIR INLET DEVICE Filed Oct. 10, 1925 g'rwemtor, Gila/Z96 leack I v t entree sures CHARLES LEACH, OF KANSAS CITY, KANSAS.

COMBINED MIXER AND AUXILIARY AIR-INLET DEVICE.

AppIicat-ion filed Gotober 10, 1925. Serial No. 61,745.

This invention relates to mixers for the intake manifolds of engines and more particularly to a device of this character which is adapted for insertion intermediate the intake manifold and carbureter of the engine.

An important obj ectof the invention is to provide a device of this character which prevents stratification of fuel in the manifold by producing within the manifold. whirl of the passing gases so that these gases form a vortex and introducing at this vortex previously heated air which will assist in evaporating and breaking up the heavier particles of fluid suspended in the mixture drawn from the carburetor. I

A further object of the invention is to produce a device of this character which may be very readily and cheaply produced, which will be durable and efiicient in service and a general improvement in the art.

These and other objects I attain by the construction shown in the accompanying drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a view partially in section show ing a device constructed in accordance with my invention inserted between the intake manifold and carbureter of an engine;

Figure Zis an end elevation of the device;

Figure 3 is a plan of the blank from which the baffle is constructed.

Figure 4: is a fragmentary elevation partially in section showing the manner in which the air inlet tube is connected with the exhaust pipe of the engine.

Referring now more particularly to the drawings, the numeral 10 designates the intake manifold of an internal combustion engine and 11 the carbureter thereof. In accordance with my invention, I insert between the attaching flanges 10, 11 of the manifold and carburetor a flange block 12, the inner surface of which is provided with a bore 13 corresponding to the bores of the carburetei. and manifold and the wall of which has formed therein a groove 14. A rectangular strip of material 15 of a length slightly or less than the internal circumference of the flange block is then slit along one marginal edge with diagonal slits 16. These tongues are each bent at an angle to the plate so that the acute angle 17 lies further from the plate than the obtuse angle 18 of the tongue and the entire tongue inclines slightly to one side of the plate. The opposite edge of the plate is slightly flared outwardly and the entire.

plate bent in a circular form so that the tongues lie at the inner side of the circle, as more clearly shown in Figure 2 with the outbent flange 19 at the outer side thereof. This flange is engaged in the groove 14 so that the metallic ring thus produced projects to one side of the flange plate.

I have stated above that the plate 15 is made of slightly less length than the inner circumference of the flange plate and there will accordingly be provided a small space between ad acent end edges of the plate. Through this space and through the wall of the flange plate a small tube 20 is directed, the inner end of which extends axially of the bore of the flange plate and the outer end of which is of sufficient length to enable its extension to the exhaust manifold against which it is engaged so that it may be heated thereby. Attention is directed to the fact that by making the ring of less size than the internal circumference of the bore of the flange plate, the ring may be contracted sufficiently to enable its flange 19 to be engaged in the groove 14 of the flange plate When the air inlet pipe is placed in posltion, it serves to prevent displacement of the ring and likewise to prevent the necessary contraction thereof which would permit the flange 19 to become disengaged from the groove.

It will be obvious that in a device of this structure, air passing from the carbureter to the intake manifold will be given a whirling motion and this whirling motion will, of course, tend to eliminate stratification and thoroughly intermingle heavier fuel particles with the lighter ones. At the vortex of the whirl thus produced, heated air entering through the conduit 20 will be injected with the result that this air will become thoroughly intermingled. with all of the air and fuel passing through the intake manifold and thus act to further atomize and evaporatethe fuel. particles carried thereby so that a well broken up fuel supply is provided. with. the engine. It will also be obvious that the construction hereinbefore described is capable of a certain range of change and modification without materially departing from the spirit of the invention and I accordingly do not limit myself to such specific structure except as hereinafter claimed.

I claim A mixing device for the carburetted fuel of an internal combustion engine adapted to be inserted between the earburetter outlet and intake manifold comprising a body member having a bore in alignment with the carburetter outlet opening and intake manifold form- 5 ing a passage for the fuel mixture, a ring inserted in the passage and having at one end thereof vanes for engaging and agitating fluids passing through the passage the 0pposite end of the ring having an out-turned 10 flange, the Wall of the bore having a groove in which the flange engages, said ring being split and of a length less than the circumference of the bore and means extending through the Wall of the bore and between adjacent ends of the ring and maintaining the ring expanded to prevent disengagement of the flange thereof from said groove and to admit air to the bore of the body.

In testimony whereof I hereunto afiix my signature.

CHARLES LEACH. 

